View RS5RJ1524A-T1-FA_6789104.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

vfm step-up dc/dc converter with voltage regulator and detector 1 rs5rj series outline the rs5rj series are cmos-based step-up dc/dc converter ics equipped with a voltage regulator (vr) and a voltage detector (vd). each of these step-up dc/dc converter ics consists of a vfm dc/dc converter, a linear regulator and a voltage detector. these ics are output-voltage-fixed type regulators which function as a linear regulator when input voltage is high, and as step-up dc/dc converter + linear regulator when input voltage is low, by using an inductor, a diode and a capacitor as external parts for the ics. since a voltage detector is built in these ics, the potentials such as the output voltage of dc/dc converters can be monitored. in addition, these step-up dc/dc converter ics are suitable for battery-powered and hand-held instruments because internal circuits can be turned off by the chip enable function so that the standby current can be mini- mized. ? low supply current ........................................... typ. 15? (rs5rj3624a : v in =3.0v,at no load) ? standby mode ..................................................... istandby=max. 1.0? (rs5rjxxxxa) istandby=max. 10.0a (rs5rjxxxxb) ? low voltage operation possible ....................... operating voltage v in =1.2v to 10v ? high output voltage accuracy ......................... fixed output voltage accuracy?.5% ? high detector threshold accuracy ................... ?.5% ? output voltage can be set at user's request (refer to selection guide). ? voltage close to battery's voltage can be output because these ics are of a step-up / step-down type (ex. a fixed voltage of 3v can be output by a 3v battery). ? built-in protection circuits for lx driver ? pin for external driver is equipped, and a large current output can be obtained. ? small package .................................................... 8pin sop features applications ? power source for cameras, camcorders, and hand-held audio equipment. ? power source for small oa apparatus such as note type personal computers,and word processors. ? power source for hand-held communication appliances such as pagers,cordless telephones, and cellular phones. no. ea-024-0204
2 selection guide in the rs5rj series, the output voltage, the detector threshold, the version symbols, and the taping type for the ics can be selected at the user's request. the selection can be made by designating the part number as shown below: for example, the product with output voltage 5.0v, detector threshold 4.5v, version a, and taping type t1, is designated by part number rs5rj5045a-t1. rs5rj block diagram + + + v ss ce vd out vd in vref1 vref2 vfm osc 1 2 3 4 5 6 7 8 l x ext v dd v out v lx limiter rs5rjxxxxx ?xx part number abc d } code contents setting output voltage (v out ): a stepwise setting with a step of 0.6v in the range of 1.5v to 6.0v is possible. b setting detector threshold voltage (? det ): stepwise setting with a step of 0.1v in the range of 1.2v to 5.0v is possible. designation of version symbols: c a: operation of all the internal circuits is stopped by setting ce pin at v dd level. b: operation of only step-up dc/dc converter is stopped by setting ce pin atv dd level. designation of taping type: d ex. 8pin sop : t1, t2 (refer to taping specification) ?2?is prescribed as a standard. } }
3 pin configuration ? 8pin sop pin description 1 2 3 4 8 7 6 5 rs5rj pin no. symbol 1v ss 2ce 3vd out 4vd in 5v out 6v dd 7 ext 8l x pin description ground pin chip enable pin voltage detector output pin.nch open drain output detection input pin of voltage detector output pin for regulator step-up output. power supply pin external transistor drive pin external inductor drive pin.
4 topt=25?c,vss=0v rs5rj absolute maximum ratings symbol item v dd supply voltage v lx l x pin voltage v ext output voltage ext pin voltage v out v out pin voltage vd out vd out pin voltage v ce input voltage ce pin voltage vd in vd in pin voltage a version b version i lx inductor drive output current lx pin current i ext ext pin current p d power dissipation topt operating temperature range tstg storage temperature range tsolder lead temperature (soldering) rating unit 0.3 to +12 v vss0.3 to +12 v vss 0.3 to v dd +0.3 v vss ?.3 to v dd +0.3 v vss ?.3 to +12 v vss ?.3 to v dd +0.3 v vss ?.3 to v dd + 0.3 v vss ?.3 to + 12 250 ma 50 ma 300 mw 30 to +80 ?c 55 to +125 ?c 260?c, 10s absolute maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. moreover, such values for any two items must not be reached simultaneously. operation above these absolute maximum ratings may cause degradation or permanent damage to the device. these are stress ratings only and do not necessarily imply functional operation below these limits. absolute maximum ratings
5 electrical characteristics rs5rj ? rs5rj3624a,b topt=25?c (note 1) standby current of version a (note 2) standby current of version b please refer to basic circuit for test circuit. symbol item v in operation input voltage v dd step-up output voltage voscst oscillator start-up voltage vhold hold-on voltage fosc maximumoscillator frequency maxdty oscillator duty cycle v ol 1 lx output voltage i oh 1 lx leakage current v lx lim lx voltage limit v oh ext output pch on voltage v ol 2 ext output nch on voltage v out output voltage v dif dropout voltage ? v out / ? i out load regulation ? det detector threshold v hys detector threshold hysteresis v ol 3 vd out on voltage i oh 2 vd out leakage current i vdinh vd in ??input current i vdinl vd in ??input current v ceh ce ??input voltage v cel ce ??input voltage i ceh ce ??input current i cel ce ??input current i dd supply current istandby standby current conditions min. typ. max. unit note no load 1.2 10 v no load 3.99 4.10 4.21 v no load 0.9 1.2 v i out =1ma 0.7 v 80 100 120 khz 65 80 90 % i ol =50ma 0.5 v 0.01 10.00 ? l x pin on 0.9 v i ext =3ma,v dd =4.1v 3.6 v i ext =5ma,v dd =4.1v 0.5 v i rl = 5ma 3.51 3.60 3.69 v i rl = 30ma 0.3 v 30ma i rl 0ma 100 mv 2.34 2.40 2.46 v 60 120 240 mv i ol =5ma 0.5 v 0.01 5.00 ? vd in =v dd 5a vd in =vss 0.5 0.5 ? v dd 0.3 v dd v 0 0.2v dd v ce=v dd 0.5 0.5 ? ce=vss 0.5 0.5 ? v in =3v, l=100?, c=22f, ce=vss, 15 30 ? no load v in =3v, l=100?, 1.0 ? note1 c=22f, ce=v dd , no load 10.0 ? note2
6 rs5rj ? rs5rj5045a,b topt=25?c (note 1) standby current of version a (note 2) standby current of version b please refer to basic circuit for test circuit. symbol item v in operation input voltage v dd step-up output voltage voscst oscillator start-up voltage vhold hold-on voltage fosc maximumoscillator frequency maxdty oscillator duty cycle v ol 1 lx output voltage i oh 1 lx leakage current v lx lim lx voltage limit v oh ext output pch on voltage v ol 2 ext output nch on voltage v out output voltage v dif dropout voltage ? v out / ? i out load regulation ? det detector threshold v hys detector threshold hysteresis v ol 3 vd out on voltage i oh 2 vd out leakage current i vdinh vd in ??input current i vdinl vd in ??input current v ceh ce ??input voltage v cel ce ??input voltage i ceh ce ??input current i cel ce ??input current i dd supply current istandby standby current conditions min. typ. max. unit note no load 1.2 10 v no load 5.36 5.50 5.64 v no load 0.9 1.2 v i out =1ma 0.7 v 80 100 120 khz 65 80 90 % i ol =50ma 0.5 v 0.01 10.00 ? l x pin on 0.9 v i ext = 3ma,v dd =5.5v 5.0 v i ext =5ma,v dd =5.5v 0.5 v i rl = 5ma 4.87 5.00 5.13 v i rl = 30ma 0.3 v 30ma i rl 0ma 100 mv 4.38 4.50 4.62 v 112 225 450 mv i ol =5ma 0.5 v 0.01 5.00 ? vd in =v dd 5a vd in =vss 0.5 0.5 ? v dd 0.3 v dd v 00.2v dd v ce=v dd 0.5 0.5 ? ce=vss 0.5 0.5 ? v in =4v, l=100?, c=22?, ce=vss, 20 40 ? no load v in =4v, l=100?, 1.0 ? note1 c=22?, ce=v dd , no load 10.0 ? note2
7 rs5rj operation of step-up dc/dc converter step-up dc/dc converter charges energy in the inductor when lx transistor (lxtr) is on, and discharges the energy with the addition of the energy from input power source thereto when lxtr is off, so that a higher output voltage than the input voltage is obtained. the operation will be explained with reference to the following diagrams: < current through l > < basic circuits > i2 sd l x tr i1 l cl v in i out v out il il min il max topen ton toff t t=1/ fosc step.1 : lxtr is turned on and current il (= i1 ) flows, so that energy is charged in l. at this moment, il(=i1 ) is increased from ilmin (= 0) to reach ilmax in proportion to the on-time period (ton) of lxtr. step.2 : when lxtr is turned off, schottky diode (sd) is turned on in order that l maintains il at ilmax, so that current il (= i2) is released. step.3 : il (=i2) is gradually decreased, and in the case of discontinuous mode, il reaches ilmin (=0) after a time period of topen, so that sd is turned off. in the case of the vfm control system, with the on-time period (ton) maintained constant, the output voltage is maintained constant by controlling the oscillator frequency (fosc).
8 rs5rj + + l x tr l x vfm osc vref1 vref2 pch tr v ss 100f 100h v dd v out v out v in 22f 1f 5 1 86 fig. a diagram of rs5rj including external circuits operation 1. v dd output voltage v dd output voltage is shown in fig. b. (1) in the case of v in ?f v dd 0: in area b, lxtr is maintained in an off state, so that v in ?f (v) is output as it is from v dd pin without step-up operation. (2) in the case of v in ?f 9 rs5rj test circuits v ss 1f 100f 100h v out v dd vd in vd out v in ce l x ext note1 i in c out 22f c vdd a c in a vv oscilloscope v in v ss v out v dd vd in vd out ce l x ext oscilloscope 100k ? oscilloscope v in v ss v out v dd vd in vd out ce l x ext test circuit 1 test circuit 2 test circuit 3 100f 100h v in i in c in digitizing oscilloscope digitizing oscilloscope (for trigger) v ss v out v dd vd in vd out ce l x ext 33k ? a a + pulse generator v ss v out v out v dd vd in vd out vd in ce l x ext a open 5.5v test circuit 5 test circuit 4
10 rs5rj 1f 100h v in i in c in c vdd 22f c out 1f digitizing oscilloscope v ss v out v dd vd in vd out ce l x ext 100 ? a a + + + pulse generator test circuit 6 1f c in c out 1f digitizing oscilloscope v ss v out v dd vd in vd out ce l x ext v in pulse generator 100 ? 220 ? c vdd 22f + + + 100h test circuit 7 i in c out v out v dd v ss v dd v out i out i dd ce ext v in c vdd a load npn tr c in cb rb d l rs5rj a a test circuit 8 l :47h(sumida electric cd105) d :schottky diode (hitachi hrp22) c in :220f(aluminum electrolytic type) rb :220 ? cb :0.01f c vdd :220f(aluminum electroltic type) c out :1f(tantalum type)
11 rs5rj by use of these test circuits,the typical characteristics were obtained as shown in the following pages: test circuit 1: typical characteristics 1) 2) 3) 4) 5) 9) 10) 13) 14) 16) (typical characteristics 13) and 14) were measured by replacing the capacitor shown in note1 with a 1f capacitor) test circuit 2: typical characteristics 11) 12) test circuit 3: typical characteristics 7) 8) efficiency is shown by the following formula: = (v out i out ) / (v in i in ) test circuit 4: typical characteristics 6) test circuit 5: typical characteristics 15) test circuit 6: typical characteristics 17) test circuit 7: typical characteristics 18) test circuit 8: typical characteristics 19) 20) in this ic, input current at no load is defined as supply current.(ce=v ss ). and when ce=v dd , the input current (no load) is defined as standby current.
12 rs5rj typical characteristics 1) output voltage vs. input voltage (topt=25?c) rs5rj5045a input voltage v in (v) 0 2 46 8 10 output voltage v out (v) 4.0 4.5 5.0 5.5 i out =10ma i out =20ma i out =30ma i out =40ma input voltage v in (v) 0 2 46 8 10 output voltage v out (v) 3.0 3.5 4.0 4.5 i out =10ma i out =20ma i out =30ma i out =40ma rs5rj3624a input voltage v in (v) 0 2 46 8 10 output voltage v out (v) 2.5 3.0 3.5 4.0 i out =10ma i out =20ma i out =30ma i out =40ma rs5rj3329a input voltage v in (v) 0 2 46 8 10 output voltage v out (v) 2.5 3.0 3.5 4.0 i out =10ma i out =20ma i out =30ma i out =40ma rs5rj4036a rs5rj3531a input voltage v in (v) 0 2 46 8 10 output voltage v out (v) 2.5 3.0 3.5 4.0 i out =10ma i out =20ma i out =30ma i out =40ma rs5rj3027a input voltage v in (v) 0 2 46 8 10 output voltage v out (v) 2.0 2.5 3.0 3.5 i out =10ma i out =20ma i out =30ma i out =40ma
13 rs5rj 2) output voltage vs. output current (topt=25?c) rs5rj5045a output current i out (ma) 0 50 100 150 v in =5v v in =4v v in =3v v in =2v output voltage v out (v) 4.5 5.0 5.5 4.0 v in =4v v in =3v v in =2v output current i out (ma) 0 50 100 150 output voltage v out (v) 3.5 4.0 4.5 3.0 rs5rj3624a v in =4v v in =3v v in =2v output current i out (ma) 0 50 100 150 output voltage v out (v) 3.0 3.5 4.0 2.5 rs5rj3329a v in =2v v in =3v output current i out (ma) 0 20 40 60 80 100 output voltage v out (v) 3.0 3.5 4.0 2.5 rs5rj4036a rs5rj3531a v in =2v v in =3v output current i out (ma) 0 20 40 60 80 100 output voltage v out (v) 3.0 3.5 4.0 2.5 rs5rj3027a output current i out (ma) 0 20 40 60 80 100 output voltage v out (v) 2.0 2.5 3.0 3.5 v in =2v v in =3v
14 rs5rj 3) ripple voltage vs. output current (topt=25?c) rs5rj5045a ripple voltage vr (mvp-p) output current i out (ma) 010 20 30 40 50 60 0 20 40 60 80 100 120 2.0v 3.0v 4.0v l=100h c out =22f tantalum v in =1.2v 2.0v 3.0v 4.0v v in =1.2v ripple voltage vr (mvp-p) output current i out (ma) 010 20 30 40 50 0 20 40 60 80 100 120 l=47 h c out =22 f tantalum rs5rj5045a 2.0v 3.0v 4.0v v in =1.2v ripple voltage vr (mvp-p) output current i out (ma) 010 20 30 40 50 60 0 20 40 60 80 100 120 l=100h c out =47f tantalum rs5rj5045a 3.0v 4.0v alminum electrolytic v in =1.2v ripple voltage vr (mvp-p) output current i out (ma) 010 20 30 40 50 60 0 20 40 60 80 100 120 l=100h c out =100f 2.0v rs5rj5045a rs5rj5045a 2.0v 3.0v 4.0v v in =1.2v ripple voltage vr (mvp-p) output current i out (ma) 010 20 30 40 50 60 0 20 40 60 80 100 120 l=220h c out =22f tantalum
15 rs5rj 4) efficiency vs. input voltage (topt=25?c) rs5rj5045a i out =40ma i out =30ma i out =20ma i out =10ma input voltage v in (v) 0 2 46810 efficiency (%) 20 40 60 80 100 i out =40ma i out =30ma i out =20ma i out =10ma input voltage v in (v) 0 2 46810 efficiency (%) 20 40 60 80 100 rs5rj3624a i out =40ma i out =30ma i out =20ma i out =10ma input voltage v in (v) 0 2 46810 efficiency (%) 20 40 60 80 100 rs5rj3329a i out =40ma i out =30ma i out =20ma i out =10ma input voltage v in (v) 0 2 46810 efficiency (%) 20 40 60 80 100 rs5rj4036a rs5rj3531a i out =40ma i out =30ma i out =20ma i out =10ma input voltage v in (v) 0 2 46810 efficiency (%) 20 40 60 80 100 rs5rj3027a i out =40ma i out =30ma i out =20ma i out =10ma input voltage v in (v) 0 2 46810 efficiency (%) 20 40 60 80 100
16 rs5rj 5) efficiency vs. output current (topt=25?c) rs5rj5045a v in =2v v in =5v v in =4v v in =3v efficiency (%) 40 30 50 60 80 70 90 100 output current i out (ma) 0 40 60 80 20 100 v in =2v v in =3v v in =4v efficiency (%) 40 30 50 60 80 70 90 100 output current i out (ma) 0 40 60 80 20 100 rs5rj3624a v in =3v v in =4v v in =2v efficiency (%) 40 30 50 60 80 70 90 100 output current i out (ma) 0 40 60 80 20 100 rs5rj3329a v in =2v v in =3v efficiency (%) 40 30 50 60 80 70 90 100 output current i out (ma) 0 40 60 80 20 100 rs5rj4036a rs5rj3531a v in =3v v in =2v efficiency (%) 40 30 50 60 80 70 90 100 output current i out (ma) 0 40 60 80 20 100 rs5rj3027a efficiency (%) 40 30 50 60 80 70 90 100 output current i out (ma) 0 40 60 80 20 100 v in =2v v in =3v
17 rs5rj 6) soft start time vs. input voltage rs5rj5045b c vdd =22f c out =1f input voltage v in (v) soft start time ts(ms) 0 5 10 15 20 25 30 1 2 3 45 6 i out =40ma 10ma 1ma i out =40ma 10ma 1ma c vdd =22f c out =47f input voltage v in (v) soft start time ts(ms) 0 5 10 15 20 25 30 1 2 3 45 6 rs5rj5045b c vdd =22f c out =100f input voltage v in (v) soft start time ts(ms) 0 5 10 15 20 25 30 1 2 3 45 6 i out =40ma 10ma 1ma rs5rj3624a oscillator duty cycle maxdty (%) 80 40 60 100 temperature topt ( ? c) 40 20 0 20 40 60 80 100 rs5rj5045b rs5rj3624a maximum oscillator frequency f osc (khz) 0 20 80 40 60 100 120 temperature topt ( ? c) 40 20 0 20 40 60 80 100 rs5rj3624a output voltage v dd (v) 4.1 3.7 3.9 4.3 temperature topt ( ? c) 40 20 0 20 40 60 80 100 7) maximum oscillator frequency vs. temperature 8) oscillator duty cycle vs.temperature 9) output voltage (v dd ) vs.temperature
18 rs5rj 10) output voltage vs. temperature rs5rj3624a output voltage v out (v) 3.6 3.2 3.4 3.8 temperature topt ( ? c) 40 20 02040 60 80 100 detectoh threshold v det (v) 2.4 2.0 2.2 2.6 temperature topt ( ? c) 40 20 02040 60 80 100 rs5rj3624a 0 1 2 3 4 5 vd input voltage vd in (v) vd output voltage vd out (v) 12 345 0 vd in pull-up resistor:100k ? rs5rj3624x temperature topt ( ? c) 40 20 0 20 40 60 80 100 0 1 2 3 4 5 stand-by current istandby (a) b version a version rs5rj3624a rs5rjxxxxa supply current i dd (a) 0 20 40 60 80 100 input voltage v in (v) 02 4 6 8 10 12 rs5rj5045a rs5rj3624a rs5rj3027a rs5rj5045a 0 0.2 0.4 0.6 0.8 1.0 vd input current i vdin (a) vd input voltage vd in (v) 0 1 2 3 4 5 6 v dd =5.5v 13) supply current vs. input voltage 14) stand-by current vs.temperature 15) vd input current vs. vd input voltage 11) detector threshold vs. temperature 12) vd output voltage vs. vd input voltage
19 rs5rj 16) start-up/hold-on voltage vs. output current 0 5 10 15 20 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) vstart vhold rs5rj5045a
20 rs5rj rs5rj5045a 17) load transient response 2 0 2 4 68 10 12 time t (ms) 0 1 2 3 4 5 6 output voltage v out (v) 0 30 60 90 120 150 180 output current i out (ma) v in =3.0v c out =1f 1ma output voltage output current rs5rj5045a time t (ms) v in =5.0v c out =1f 2 0 2 4 68 10 12 time t (ms) 0 30 60 90 120 150 180 output current i out (ma) 1ma 0 1 2 3 4 5 6 output voltage v out (v) output voltage output current rs5rj5045a v in =3.0v c out =47f 2 0 2 4 68 10 12 14 16 18 time t (ms) 0 30 60 90 120 150 180 output current i out (ma) 1ma 0 1 2 3 4 5 6 output voltage v out (v) output voltage output current
21 rs5rj rs5rj5045a time t (ms) v in =5.0v c out =47f 2 0 2 4 68 10 12 14 16 18 time t (ms) 0 30 60 90 120 150 180 output current i out (ma) 1ma 0 1 2 3 4 5 6 output voltage v out (v) output voltage output current rs5rj5045a v in =3.0v c out =100f 2 0 2 4 68 10 12 14 16 18 time t (ms) 0 30 60 90 120 150 180 output current i out (ma) 1ma 0 1 2 3 4 5 6 output voltage v out (v) output voltage output current rs5rj5045a v in =5.0v c out =100f 2 0 2 4 68 10 12 14 16 18 time t (ms) 0 30 60 90 120 150 180 output current i out (ma) 1ma 0 1 2 3 4 5 6 output voltage v out (v) output voltage output current
22 rs5rj rs5rj5045a 18) line transient response 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =1ma c out =1f output voltage input voltage rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =1ma c out =1f output voltage input voltage rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =30ma c out =1f output voltage input voltage
23 rs5rj rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =30ma c out =1f output voltage input voltage rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =1ma c out =47f output voltage input voltage rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =1ma c out =47f output voltage input voltage
24 rs5rj rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =30ma c out =47f output voltage input voltage rs5rj5045a 2 0 2 468 10 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =30ma c out =47f output voltage input voltage rs5rj5045a 2 0 2 468 10 14 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =1ma c out =100f output voltage input voltage
25 rs5rj rs5rj5045a 2 0 2 468 10 14 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =1ma c out =100f output voltage input voltage rs5rj5045a 2 0 2 468 10 14 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =30ma c out =100f output voltage input voltage rs5rj5045a 2 0 2 468 10 14 12 time t (ms) 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 output voltage v out (v) 4 6 8 10 12 14 input voltage v in (v) i out =30ma c out =100f output voltage input voltage
26 rs5rj 19) output voltage vs. v dd output currrent rs5rj5045a 0 100 200 300 400 500 600 700 v dd output current i ddout (ma) 4.6 4.8 5.0 5.2 5.4 5.6 5.8 6.0 output voltage v out /v dd (v) i out =20ma v dd v out v in =1.2v 2.0v 3.0v 4.0v v dd v in =1.2v 0 100 200 300 400 500 600 700 v dd output current i ddout (ma) 4.6 4.8 5.0 5.2 5.4 5.6 5.8 6.0 output voltage v out /v dd (v) i out =40ma 2.0v 3.0v 4.0v v out rs5rj5045a v dd 0 100 200 300 400 500 600 700 v dd output current i ddout (ma) 4.6 4.8 5.0 5.2 5.4 5.6 5.8 6.0 output voltage v out /v dd (v) i out =60ma v in =1.2v 2.0v 3.0v 4.0v v out rs5rj5045a v in =1.2v 0 100 200 300 400 500 600 700 v dd output current i ddout (ma) 0 10 20 30 40 50 60 efficiency (%) i out =40ma 70 80 90 100 2.0v 3.0v 4.0v rs5rj5045a rs5rj5045a 0 100 200 300 400 500 600 700 v dd output current i ddout (ma) 0 10 20 30 40 50 60 efficiency (%) i out =20ma 70 80 90 100 v in =1.2v 2.0v 3.0v 4.0v rs5rj5045a v in =1.2v 0 100 200 300 400 500 600 700 v dd output current i ddout (ma) 0 10 20 30 40 50 60 efficiency (%) i out =60ma 70 80 90 100 2.0v 3.0v 4.0v 20) efficiency vs.v dd output current = (v dd i ddout ) + (v out i out ) 100 v in i in (note) efficiency at typical characteristics 20) is shown by the following formula:
27 rs5rj basic circuit inductor diode vss v out + capacitor ext v dd v dd v in ce vd out vd in lx examples of parts : inductor : rcr-664d (100?) ; sumida electric co., ltd. diode : ma721 (schottky type) ; matsushita electronics corporation capacitor : 22? (tantalum type)
28 rs5rj typical applications ?current boost circuit 1 vss ext d rs5rj v dd v out ce v in l c in npn tr rb cb c vdd c out rbe cbe pnp tr v out l : 47h(sumida electric cd105) d : schottky diode (hitachi hrp22) c in : 220f(aluminum electrolytic type) c vdd : 100f(tantalum type)/ 220f(aluminum electroltic type) c out : 47f(tantalum type) examples of components c d :0.01? cbe :0.1?(rs5rj5045x, rs5rj4036x, rs5rj3624x) 100pf(rs5rj3531x, rs5rj3329x, rs5rj3027x) npn tr :2sd1628 pnp tr :2sa1213 rb :220 ? rbe :12 ? ?current boost circuit 2 (high efficiency circuit) vss ext ext d v dd v dd v out ce ce v in l c in npn tr rb1 cb c vdd c out rbe pnp tr v out rs5rj 5045x rn5rg 50a rb2 gnd ( note ) high efficiency current boost circuit,using rs5rj5045x with rn5rg50a(ricoh voltage regulator). l : 47h(sumida electric cd105) d : schottky diode (hitachi hrp22) c in : 33f(tantalum type)/ : 220f(aluminum electrolytic type) c vdd : 33f(tantalum type)/ 220f(aluminum electrolytic type) c out : 47f(tantalum type) examples of components c d : 0.01f npn tr : 2sd1628 pnp tr : 2sa1213 rb1 : 220 ? rb2 : 330 ? rbe : 10k ?
rs5rj 29 when using these ics, be sure to take care of the following points: ? set external components as close as possible to the ic and minimize the connection between the compo- nents and the ic. in particular, when an external component is connected to v out pin, make minimum con- nection with the capacitor. ? make sufficient grounding. a large current flows through v ss pin by switching. when the impedance of the v ss connection is high, the potential within the ic is varied by the switching current. this may result in unstable operation of the ic. ? use capacitor with a capacity of 10? or more, and with good high frequency characteristics such as tanta- lum capacitor. we recommend the use of a capacitor with an allowable voltage which is at least three times the output set voltage. this is because there may be the case where a spike-shaped high voltage is generat- ed by the inductor when lx transistor is turned off. ? take the utmost care when choosing a inductor. namely, choose such an inductor that has sufficiently small d.c. resistance and large allowable current, and hardly reaches magnetic saturation. when the inductance value of the inductor is small, there may be the case where i lx exceeds the absolute maximum ratings at the maximum load. use an inductor with an appropriate inductance. ? use a diode of a schottky type with high switching speed, and also take care of the rated current. the performance of power source circuits using these ics largely depends upon the peripheral components. take the utmost care in the selection of the peripheral components. in particular, design the peripheral circuits in such a manner that the values such as voltage, current and power of each component, pcb patterns and the ic do not exceed their respective rated values. application hints

▲Up To Search▲

Price & Availability of RS5RJ1524A-T1-FA

	To Download RS5RJ1524A-T1-FA Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .